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The International Journal of Oral & Maxillofacial Implants



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Int J Oral Maxillofac Implants 15 (2000), No. 3     15. June 2000
Int J Oral Maxillofac Implants 15 (2000), No. 3  (15.06.2000)

Page 438-443

Histologic Evaluation of Hydroxyapatite-Coated Root-Form Implants Retrieved after 7 Years in Function: A Case Report
Proussaefs, Periklis T. / Tatakis, Dimitris N. / Lozada, Jaime L. / Caplanis, Nicholas / Rohrer, Michael D.
This case report presents a clinical, radiographic, and histologic evaluation of 2 non-adjacent, hydroxyapatite-coated, root-form implants retrieved from the maxillary canine area of a patient after 7 years in function. Clinical examination revealed immobile implants with no sign of pathosis. Radiographic examination indicated close proximity of the bone to the implant surface without evidence of radiolucency. Histologically, the 2 implants appeared to be well integrated with the surrounding bone; 84% of the surface of the first implant and 79% of the surface of the second implant had close bone apposition at the interface. There was no evidence of dissolution of the hydroxyapatite coating. The bone appeared to be in immediate contact with the coating. These observations suggest that a particular hydroxyapatite coating on root-form implants can resist degradation during long-term function.

Keywords: dental implants, histology, hydroxyapatite, osseointegration, radiography